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Upper limits on the stochastic gravitational-wave background from Advanced LIGO's first observing run


Abbott, BP and Abbott, R and Siellez, K and Zweizig, J, LIGO Scientific Collaboration and Virgo Collaboration, Upper limits on the stochastic gravitational-wave background from Advanced LIGO's first observing run, Physical Review Letters, 118, (12) Article 121101. ISSN 0031-9007 (2017) [Refereed Article]

Copyright Statement

© 2017 American Physical Society.

DOI: doi:10.1103/PhysRevLett.118.121101


A wide variety of astrophysical and cosmological sources are expected to contribute to a stochastic gravitational-wave background. Following the observations of GW150914 and GW151226, the rate and mass of coalescing binary black holes appear to be greater than many previous expectations. As a result, the stochastic background from unresolved compact binary coalescences is expected to be particularly loud. We perform a search for the isotropic stochastic gravitational-wave background using data from Advanced Laser Interferometer Gravitational Wave Observatory's (aLIGO) first observing run. The data display no evidence of a stochastic gravitational-wave signal. We constrain the dimensionless energy density of gravitational waves to be ?0<1.7x10-7 with 95% confidence, assuming a flat energy density spectrum in the most sensitive part of the LIGO band (20-86 Hz). This is a factor of ~33 times more sensitive than previous measurements. We also constrain arbitrary power-law spectra. Finally, we investigate the implications of this search for the background of binary black holes using an astrophysical model for the background.

Item Details

Item Type:Refereed Article
Keywords:Gravitational wave, Stochastic gravitational-wave background, Advanced LIGO
Research Division:Physical Sciences
Research Group:Astronomical sciences
Research Field:General relativity and gravitational waves
Objective Division:Expanding Knowledge
Objective Group:Expanding knowledge
Objective Field:Expanding knowledge in the physical sciences
UTAS Author:Siellez, K (Dr Karelle Siellez)
ID Code:152123
Year Published:2017
Web of Science® Times Cited:173
Deposited By:Physics
Deposited On:2022-08-11
Last Modified:2022-09-28

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